Number Line
Use a number line to solve:
302 + 56 = ____
358
Ms. Martin is using partial sums to solve 546 + 470.
What two numbers would she add to find the partial sum of the hundreds?
500 + 400
Which can be used to estimate the sums of
395 + 202 = ?
a. 395 + 202 = ___
b. 400 + 200 = ___
c. 400 + 100 = ___
d. 300 + 200 = ___
b
Which standard form number represents the same value as
4 hundreds, 8 tens, and 7 ones blocks?
487
what is 657 rounded to the nearest ten?
660
Copy this number line on your board, and round "172" to the nearest 100.
<----------------------------------------------->
100 200
200
what strategy could be used to find the sum of 248 and 142.
a. (200 + 400) + (80 + 20) + (1 + 0) =
b. (800 + 200) + (400 - 400) + (2 + 1) =
c. (200 - 100) + ( 40 + 40) + (8 + 2)
d. (200 + 100) + (40 + 40) + (8 + 2)
d
788 + 130 = ____
800 + 100 = 900
What standard form number represent the same value as
9 hundreds and 6 ones blocks?
906
Mrs. Pepper does 140 pushups on Monday, 112 pushups on Tuesday, and 234 pushups on Wednesday.
She adds 140 + 112 + 234 to find the total number.
Which of the following expressions is another way she could find the total number of pushups?
a. 140 + 112 - 234+ =
b. 234 - 140 - 122 =
c. 234 + 140 + 112 =
d. 112 + 140 - 234 =
c. 234 + 140 + 112 =
Copy this number line on your board, and round "442" to the nearest 100.
<----------------------------------------------->
400 500
400
What is the combined sum of these two glasses of juice? One holds 112 liters and the other holds 330 liters.
443 liters
Which can be used to estimate the sum of 467 + 138 = ____ ?
○ 470 + 200 = _____
○ 400 + 100 = _____
○ 500 + 150 = _____
○ 500 + 100 = _____
500 + 150 = 650
Which value is correct?
2 hundreds, 9 tens, and 8 ones blocks?
298
Ava is adding three numbers: 163 + 289 + 237.
She says, “I can group the numbers in a way that makes it easier to add.”
Which way of grouping the numbers shows how the associative property can help make the problem easier to solve?
○ 163 + 289 = 452
452 + 237 = 689
○ 289 + 237 = 526
526 + 163 = 689
○ 163 + 237 = 400
400 + 289 = 689
163 + 237 = 400
400 + 289 = 689
Which number lines represent 560 to the nearest 100?
< -----------------------------------------*>
500 550
< -----------------------------------------*>
500 600
< --------------------------------------*---->
600 700
< ---------*-------------------------------->
500 600
< -----------------------------------------* >
500 600
Mrs. Wait collects marbles. She has 338 blues marbles and yellow 412 marbles. How many marbles does she have altogether?
750
Which can be used to estimate the sums of
567 + 112 = ___
a. 560 + 212 = ___
b. 500 + 100 = ___
c. 580 + 110 = ____
c. 580+ 110 =
Which of the following represents the same value as
6 hundreds + 32 tens + 5 ones?
○ 625
○ 745
○ 935
○ 6325
745, because:
6 hundreds = 600
32 tens = 320
5 ones = 5
→ 600 + 320 + 5 = 925
Ms. Anderson is collecting marbles. He has 412 red marbles and 365 blue marbles.
Which equation could be used to find how many marbles she has in all?
○ □ = 412 + 365
○ 412 - 365 = □
○ □ = 412 + 300
○ 365 + 300 = □
□ = 412 + 365
Round 670 to the nearest hundred.
<-------------------------------------->
600 700
700
Mr. Reeve is solving 188 + 910 by using partial sums. What two numbers would he use to find the partial sums of the tens?
80 + 10
Estimate the sum.
154 + 819
150 + 820 = 970
or
200 + 800 = 1,000
If Ms. Wait handed you 5 hundreds blocks, 9 tens blocks, and 4 ones blocks, what would be the total value of the blocks she gave you?
594
Which strategy can be used to find the sum of 346 and 172?
○ (300 + 100) + (40 + 70) + (6 + 2)
○ (300 - 100) + (40 - 70) + (6 - 2)
○ (300 + 200) + (40 + 80) + (6 + 3)
○ (300 - 200) - (40 - 70) - (6 - 2)
(300 + 100) + (40 + 70) + (6 + 2)